Fabrik mauser



(No Model.)

Patented May 5", 1891.

. a. NJ

o an WITNESSES.- W $6M r g p Urrrrnn terns n'rniwr nrica.

PAUL MAUSER, OF OBERNDORF, GERMANY, ASSIGNOR'TO THE WAFFEN- FABRIK MAUSER, OF SAME PLACE.

GUN -BARRL.

SPECIFICATION forming part of Letters atent No. 451,768, dated May 5, 1891.

I Application filed June 6, 1890. Serial No, 354,539. (No model.)

Germany, have invented certain new and useful Improvements in Barrels forBreech-Loading Guns, of which the following is a specification.

In the accompanying drawings, which illustrate my invention as applied to a breechloading gun, Figure 1 is aside elevation of a gun=barrel, showing a portion of the stock and breech-block in longitudinal section. Fig. 2 is afragmentary side elevation of the central portion of the grin-barrel, showing the stock and fastening in longitudinal section, the view being on a somewhat larger scale than Fig. 1. Fig. 3 is a cross-section of'the barrel and stock, out on the line 3 3 in Fig. 2 and lookingin the direction of the arrow. Fig. .4 is a fragmentary side elevation of the back portion of the barrel, showing the fastening to; the back sight in longitudinal section. 5 is a cross-section thereof, out on the has 5 5 in Fig. 4 and looking in the direction of the arrow. Fig. 6 is a fragmentary side elevaion of the front portion of the barrel, showing the forward end of the stock and the fastening in longitudinal section- Fig. 7-is a cross-section of the barrel, out on the line 7 7 .in Fig. 6 and looking in the direction of the screwed into the breech-case to the muzzle,

and the barrels have been fastened to the gunstock. by rings or by projections from the barrels which have been embedded in and fastened to the stock. In rapid firing the barrel becomes heatedand therefore expands or lengthens. Heretofore its fastenings have not permitted it to lengthen when expanded by this heating, and the barrel therefore has having :a contracted'front cud engaging the front endof" the'barrel. This arrangement, however, did not allow the free lengthening of the barrel due to expansion, and it had the further disadvantage that it either increased the weight of the arm, or, if the barrel was made correspondingly lighter, reduced its stabilility. The present invention aims to overcome these difficulties and produces a gun-barrel which can expand and lengthen freely and is as stifi and strong as any ordinerygun barrel of the same weight. It also provides improved means whereby the front and back sights can be easily mounted and adjusted, and means whereby the back end of the barrel can be readily adjusted to the closing-bolt in case the tight joint at this place should have been destroyed by too frequent firing.

Referring to the accompanying drawings, let A represent the gun-barrel, B the gunstock, and h the breech-case. The barrel A has a back swell g, which has no faces, but is cylindrical and is screwed into the breech-case 7L,

and its remaining external surface consists of a plurality of portions of different sizes, each such portion being of uniform cross-see tion throughout'its length. r In the construction shown these portions are cylindrical and of about equal length, the back portion a being of the necessary diameter to resist the bursting strain-due to the explosion of the cartridge which is seated in the swell g. The front portion Z) of the barrel is throughout its entire length preferably of as small a diameteras is usually used at the muzzle end only. At the point where the two portions a and 1) meet it is important to avoid sharp corners, and the transition from the surface of the one portion to that of the othershould be effected by a rounded shoulder. The barrel is closely [fitted to the stock and is secured thereto by fastening provisions, constructed to hold the parts together laterally, butto permit longitudinal movement of the barrel relatively to the stock. This is preferably accomplished by two bands 62 and e. The band dis mounted directly over the junction of the barrel portions at and b, and is provided with an inner oflsetat its forward, side which touches the portion 12, while at=its rearward sideits inner surface bears against the portion a, its inner surface being constructed to leave a free annular space in front of the shoulder between the portions a. and b. A corresponding free annular space is milled out of the wood of the gunstock, as best seen in Fig. 2, thus leaving a free annular space around the forward end of the portion a of the barrel, which construction allows the portion a to expand and lengthen freely under the band (Z. The band e is near the muzzle of the barrel and its upper semicircular portion engages the portion 5 of the barrel, while its lower part engages the end of thestock, to the front face of which is fastened a metal plate 19, fitting at its upper part to the under side of the barrel. By this construction the barrel is firmly held to the stock by the band e, while it can expand and lengthen freely under the band and over the plate p. The plate 19 has a hole through which the cleaning-rod Z passes when it is placed in its seatin the stock. The fastening-band e is held to the stock by a springhook e on the under side of the latter, which engages at its forward end with a notch in the under side of the band 6. rod Z, when pushed into the gunstocli, rests immediately over the spring-hool'r e and prevents the inward movement of the latter, thereby looking it in engagement with the band 6.

In case the tight joint between the back end ofvthe barrel A and the closing breech-bolt of't'ne lock becomes impaired byfrequent firin g of the arm, this difficulty can be remedied by removing the barrel from the breech-case by unscrewing it therefrom and then turning off sufficient material from the back face of the swell g to enable the barrel tobe screwed home again into the breech-case until the tight joint is restored. By doing this the barrel is turned more or less, owing to the fact thatit is screwed farther into the breechcase than originally, so that the two gunsights m and A: will not stand directly at the top of the barrel and it will be necessary-that they be taken off and adjusted. If they were mounted in the usual way, this removal and adjustment would be a tedious and expensive alteration; but my present invention provides an improved construction for mounting the gun-sights by means of which they may be easily and rapidly adjusted.

In the drawings, Z; is the front sight, and v is the back sight. The foot or support 7; of the front sight is provided with a ring 1', which The cleaningis pushed upon and fits snugly over anofllset or slightly-reduced cylindrical portion at the muzzle of the gun-barrel, where it IS secured in the correct position, preferably by a setscrew, after which it is fixedly secured to the barrel by soldering it thereto. lhe back sight 1; is carried by a tube-like foot or support 00, which is pushed overthe portion a of the barrel and secured in the correct position, preferably by drawing together the split portion of the tube-like support :20 by the transverse screw '11, thereby clamping it in place on the barrel.

If desired, instead of using the screw it for fastening the support 00 in place, the screw 0, which fastens the sightsspring to the support 00, may be used to secure the latter to the barrel. After securing the support a; to the barrel it is fixed in position by tin solder. Thus the parts are heldfirmly in position. When, however, the barrel has been turned in restoring the tight joint between it and the breech-bolt, it is necessary to readjust the sights. This can then be easily done by slightly heating the barrel, which will melt the solder, so that after loosening the securing-screws each of the sights may be turned to the new and correct position, where they can be again secured by tightening the fast ening-screws. When the barrel cools down sufficiently, the tin solder will harden and fix the sights to the barrel. again.

My invention can be variously modified, but without departing from its essential features, and I do not limit myself to the specific features of construction shown and described as constituting the preferred form of my invention.

lVhat I claim is, in a breeclrloading gun of small caliber, the following defined novcl features and combinations, substantially as hereinbefore set forth, namely:

1. In a small-caliber breech-loading gun, the combination, with the gunstock and the barrel constructed with two cylindrical portions a and Z) of different diameters, of the central band cl for fastening the barrel to the stock, constructed with an offset to fit the two cylindrical portions a and b of the barrel, and constructed to leave a free space in the front portion a of the barrel, and said stock constructed with a free space in front of the portion a of the barrel, whereby expansion of the'latter is permitted.

2. In a small'caliber breech-loading gun, the combination, with the gunstock and the barrel constructed with a cylindrical front portion 1), of a fastening between the barrel and stock, consisting of the front band e,constructed to fit at its upper part to the portion Z) of the barrel, and the plate 11, screwed to the stock. I

3. The combination, with a-gun-barrel having a cylindrical portion and a gun-sight therefor, of a fastening for securing'said sight to said barrel, consisting of a tube-like clamp carrying the sight and fitting closely over said carrying the sight and fitting closely over said cylindrical portion and soldered thereto. 10 cylindrical portion and constructed to be This specification signed by me this 26th clamped thereto. I day of March, 1890. I

4. The combination,with a gun-barrel hav- PAUL MAUSER. ing a' cylindrical porjaion and a gun-sight Wit-messes: therefor, of a fastening for securing said sight CARL T. BARRHARDT,

to said barre], consisting of a tube-like clamp CHAPMAN COLEMAN. 

